Chain.



J. M. DODGE.

' CHAIN. APPIJGATION FILED MAR. 31,1904.

Patented Oct. 20, 1908.

manna...

JAMES M. DODGE, OF PHILADELPHIA, PENNSY VANIA.

Specification .ofiLetters Patent.

Application filed. March 31, 1904. Serial N o. 20l.,001.

T all whom it may concern: Be it known that I, JAMES M. DODGE, a citizenof the United States, residing in .Ihiladelphia, Pennsylvania. haveinvented certain Improvements in Chains, of which tl'le'folllowing is aspecification.

My invention relates to certain improve-- nientsin chains of the typebroadly claimed in an application for patent filed by me on 1o the 17thday of'March 1904:, Serial X0.

198,655,- in which extended bearings are provided for tl1e-li'nks-orelements of the chain.

The object of my present invention is to improve the construction ofthat type of 5 chain in which the pivot pin is carried by one linkandahearii'ig or bushing is carrletl by another link to which the firstlink is connected, whereby an extended bearing is provided: and toprevent the rapid wean- 20 mg away ot the pivot pmsand link elements ofchains in which the links are composed of a series of flat linkelements.

In the accompanying drawings :--Figure 1. is a longitudinal sectionalview of a chain illustrating my invention: Fig. 2, is a tion on the line22, Fig. '1: Fig. 3, a detached perspective view of the pivot. .pin:Fig. at, is a detached perspective view of the bushing; 'lligso and (3.are side views of portions of the links; and Figs. 7. 8 and 9,

are views of modifications of my invention.

Referring to Figs. 1 ,to 6 inclusive, the chain is made up of two setsof flat links or elements A and B, these links are, in the .35 presentinstance, arranged in series. being flat, as shown in Fig. 2. In thepresent instance the hnks are separated by washers .0

although in some instances the washers mayv be dispensed with.

40 1 D is the pivot pin by which the links are --coupled together, thepivot pin has a head (Z on one end and a reduced head cl at the oppositeend. In order to prevent the pin withdrawing'I provide a washer (Z heldto the reduced head by a spring ring (Z Heretofore the fiat linkswere-in direct contact with the pivot pin so that each had itsindividual bearing. By the construction herein shown I provide a singlebearing for each series of links and lengthen the beari'ng by theintroduction of washers between the sections, and I attach the pivot pinto one set of links so that it will turn with the said links, and .Iattach a bushing Eric {1- ing a bearing, to the other set ot'linlii s soing taking the wear on'the which the pin hasa rib i which. rests in a.

a recess a in the link A and the link is cut away at a to allow the ribon the pivot pin D to have suilicient play in order that the chain mayaccommodate itseli to sprocket wheel or a curved guide. 1

All the links A are recessed at u for the reception of the singlehearing or bus in the present instance, so that an e; bearing isprovided for the links. (in the other hand, the pivot pin I) isconnected to both links 13 and there is (-onseqiumtly an extendedbearing for these links. thus I am enabled not only to reduce the wearbut to give a maximum amount of bearing to the links at the pivot.making a very substantial connect ion.

It will be understood that the pivot pin may be fastened in any suitablemanner without departing from my invention and any number of linkelements may he used;

Modifications of the arrangement and design of the links will readilysuggest themselves, for instan e. a forked link 13 may l 0 used as shownin Fig. ,7. which is coupled to a single. member A. the pivot D andhushing E having the. full bearing of the width of the chain, or thelinks may be ,separated to receive a roller or flight.

In Fig. 8, I have shown two links El and B coupled together by a pivotpin I) at tached to the link 13 and extending iutoan opening in the linkwhile a segmental bushing or bearing which may he made detachable, ismounted in an opening in the link A and so held as to turn with saidlink and extends laterally into an opening in the link B which 'is ofsuch a size as to allow the bearing to turn therein.

In Fig. 9, I have shown a pivot pin I)'* made integral with the link I?and a bearing E extending laterally from the-link t and into an openingin the linkB'h Th is the pivot pin and bushings or bearings may beratsatd oct. 2b, wa

I have illustrated one construction in recess 1) in the link B, thislink is cut away at. 7/ to allow the segmental bearing E to play. Thesegmental DQHTIHIQE snugly fits that it. will turn with said-links, thebush Hit) made integral With-their links or made sepa? rately andattached-"thereto Without .departing T110111 my invention.

I claim as my invention':

1. The combination in a chain, of two sets of links, a pivot pin havinga rib engaging one' set of links, and a segment of -a ushing mounted onthe pin and having its "edges in engagement with shoulders on the 10 ytending the full width of the chain, substanother set of links, saidbushing and pins ex- -ti'ally as described. 1

2. The combination in a chain, of two sets voflinks, a pivot pin havinga rib engaging 'to be immovabl Ja pivot-pin-opening and a segment of abushing'forming a 'pivot-pin-bearin detach--- ablyfixed' within saidopening an extending laterally from said link, substantially asdescribed; i

i 4. The combination in a chain, of two sets of links, the links of oneseteach having an opening, of which the greater portion is circular 1noutline and the remainder has'a toothed shaped recess, a pivot pinhaving a longitudinal rib entering the toothed shaped recess of saidfirst set of links, the second set of links each also having an openinof which a portion is formed to permit 0 the free movement of the pivot'pin and its rib,

with a segment of a' bushing fixed in the remaining portion of theopening of said second set of links and fittlng around the pivot pin,substantially as described.

In testimony whereof,- I have signed my name tothis specification, inthe presence of two subscribing witnesses.

JAMES M. DODGE. Witnesses:

l-VILL. A. BARR,

Jos. H. KLEIN;

